Fuse device.



100.800,025. I PATENTBD 0012.3, 1905. 0. A. ROLFE.

FUSE DEVICE.

APPLIGATIoN ,FILED H2B. 1s. 1003.

UNITED STATES PATENT OFFICE.

CHARLES A. ROLFE, OF ADRIAN, MICHIGAN, ASSIGNOR, BY MESNE ASSIGNMENTS, TO ROLFE ELECTRIC CO., OF ROCHESTER, NEV YORK, A CORPORATION OF NEW YORK.

FUSE DEVICE.

Speccation of Letters Patent.

Patented Oct. 3, 1905.

Application filed February 13, 1903. Serial No. 143,226.

To all whom t may concern:

Be it known that I, CHARLES A. RoLFn, a citizen of the United States, residing at A drian, in the county of Lenawee and State of Michigan, have invented a certain new and useful Improvement in Fuse Devices, of which the following is a full, clear, concise, and exact de scription, reference being had to the accompanying drawings, forming a part of this speciiication.

My invention relates to fuse devices, and especially to such devices consisting of an insulating-tube with a fine fuse-wire inclosed therein, the tube being provided at its ends with devices by which it can be attached to conductors in the circuit.

The objects of the invention are to simplify the construction of fuse devices of this kind, to increase their eiiiciency, and to cheapen their cost.

In the accompanying drawings, Figure l is an elevation of a fuse device embodying my presentinvention. Fig. 2 is alongitudinalsection of the same. Fig. 3 is a View in perspective of the upper part of the device with certain of the parts separated from one another.

The fuse device shown comprises a tube l, of wood or similar insulating substance, conveniently coated on the outside with waterprooi' paint. At each end of the tube l is a threaded brass sleeve 2, which extends down for a portion of its length into the end of the tube l, as Well shown in Fig. 2. A metal ring or band 3 is arranged about the tube l, near the end thereof, and pins 4 et are passed through the band or ring 3, the tube l, and into the threaded sleeve 2. This construction is conveniently formed by passing a rivet or pin through the ring and tube and then reboring the sleeve 2 to separate the rivet between its ends. A iiuted washer 5 is fitted over the threaded sleeve 2 next the end of the tube 1, and a fiat washer 6 is arranged on the sleeve 2 outside of the iuted washer 5. Locknuts 7 and 8 are arranged on the sleeve 2 outside of the lat washer 6. The arrangement just described is desirably the same at both ends of the device, and hence the above description answers for both. A fuse 9 is arranged within the tube l and sleeves 2 2. Its ends are conveniently soldered to the outer ends of the tubes 2 2.

The device thus described is connected in the line by arranging the conductors between the luted and iat washers 5 and 6 and in the iutes of the former and then screwing setnuts 7 and 8 down so as to lock the cond uctors securely in position. It will be seen that the iuted washer 5 provides convenient grooves or channels for the conductors, by which they are easily grasped and held against movement. The channels thus provided are adapted to accommodate different sizes of wire, thereby-making possible the use of the device with many different sizes and kinds of wire. The iiutes of the washer 5 press against the ends of the tube l, thereby producing a lirm and secure clamping action and at the same time tending strongly to prevent turning or twisting on the part of the washer.

It will be seen from the foregoing that the device is simple and practical and has certain specilic advantages, among which are those mentioned.

Vhat I claim as my invention is 1. In a device of the class specified, the combination of an insulating-tube, a threaded sleeve having a portion of its length inserted into the end of said tube, a band or ring about the end of said tube, pins extending through said band and through the walls of the tube into the sleeve, and connecting devices arranged upon said sleeve, substantially as described.

2. In a device of the class specified, the combination of an insulating-tube, a threaded metallic sleeve having a portion of its length inserted into the end of said tube, a band arranged about the end of the tube, pins extending through the band and the walls of the tube and into said sleeve, luted and fiat washers arranged upon said sleeve, and lock-nuts also arranged upon said sleeve, substantially as described.

combination of an insulating-tube, a threaded sleeve having a portion of its length inserted in the utes or channels thereof, substantially into the end of the tube, a band arranged as described. IO about the tube near the end thereof, pins eX- In witness whereof I hereunto subscribe my tended through the band and through the Walls name this 22d day of January, A. D. 1903.

5 ofthe tube and into the sleeve, a uted Washer CHARLES A. ROLFE.

arranged upon the threaded sleeve and adapt- Witnesses: ed to t against the end ofthe tube, and means A. MILLER BELFIELD,

for clamping the Wire against said Washer and I. C. LEE. 

